Is it possible to use multiple $ this inside a helper in codeigniter

I am creating a form error logger, but since my register.php controller is filling up I thought to move this to the helper, but the problem is I cannot use $ this.

Yes, I have checked and there are some anders who fix this issue using:

function test()
{
    $CI =& get_instance();
    $CI->load->database();
    echo $CI->db->hostname; // give the config name here (hostname).
}

      

        
        
        
      

    

(Quoted from the database Acess config variables from the helper )

However, my problem is that I can only use one model for each function and see how my code that I am trying to move is like this:

function submitCheck() {
    $this->load->model("User");
    if(empty($post)) { //If anything is empty the view will be loaded
        $this->load->view('includes/header.php');
        $this->load->view('error_message.php'); 
        $this->load->view('includes/footer.php'); 

        if(empty($post['firstname'])) //This is for the error log
        {  
            $this->load->helper('array', 'error'); //Loading the helper
            echo $msg = errorLog('firstname');
            $this->load->view('error_message.php');
        }        

        if(empty($post['mail'])) //This is for the error log
        {
            $this->load->helper('error'); //Loading the helper
            echo $msg = errorLog('mail');
        }
    }
    else
    {
        echo "Everything is filled in";
    }
}

      

        
        
        
      

    

So, if after the example code I need to do about 4/5 functions for each $ this. Should I create a loader that in terms of loading other loaders, or can I use user_loader to load other views / models.

I'm starting with codeIgniter, so maybe I just thought it was too hard and there is an easy fix, but I can't find it. Any help is determined

Thanks in advance!